Karsten H.-Azure AI Engineer
Check rate
Experience
Azure AI Engineer
Vattenfall
Enterprise Search SharePoint Connector: Crawler pipeline ingesting documents, lists, and site pages from 3 SharePoint domains into Azure AI Search. Metadata enrichment via Azure OpenAI (embeddings, markdown conversion). Domain Tag system for scoped retrieval. Managed Identity authentication (Sites.Selected)
External Azure AI Engineer
Vattenfall
Enterprise Search SharePoint Connector: Crawler pipeline ingesting documents, lists, and site pages from 3 SharePoint domains into Azure AI Search. Metadata enrichment via Azure OpenAI (embeddings, markdown conversion). Domain Tag system for scoped retrieval. Managed Identity authentication (Sites.Selected)
SharePoint GPT Extensions (SPFx 1.20, React, TypeScript): AI-powered frontend with RAG Chat, File Uploader with AI metadata extraction, List Command Set. 20+ Fluent UI components, streaming API, per-site configuration, multi-tenant deployment, in-app self-test suite.
Lookout GPT - Market Intelligence Platform: Custom RAG for Vattenfall strategy team. Q&A over 2000+ competitor reports. OpenAI Responses API + Vector Stores, Azure Functions middleware, overnight crawler, megaprompt optimization (4x token reduction). Sole developer, multi-site deployment.
Azure AI Engineer
Vattenfall
SharePoint GPT Extensions (SPFx 1.20, React, TypeScript): AI-powered frontend with RAG Chat, File Uploader with AI metadata extraction, List Command Set. 20+ Fluent UI components, streaming API, per-site configuration, multi-tenant deployment, in-app self-test suite.
Azure AI Engineer, SharePoint Developer
Vattenfall
Lookout GPT - Market Intelligence Platform: Custom RAG for Vattenfall strategy team. Q&A over 2000+ competitor reports. OpenAI Responses API + Vector Stores, Azure Functions middleware, overnight crawler, megaprompt optimization (4x token reduction). Sole developer, multi-site deployment.
Full-stack AI solution for Vattenfall's strategy team. RAG-based conversational Q&A over 2000+ competitor reports using OpenAI Responses API with Vector Stores. Achieved 90% factuality in automated benchmarks vs. 53% for Microsoft Copilot. AI metadata extraction using optimized megaprompts (4x token reduction). Multi-site deployment with overnight crawler, per-site configuration, and security-trimmed access. Cost: 10 EUR/user/month (1/3 of Copilot). Sole developer and architect.
SharePoint Developer
Vattenfall
Change Management Request PowerApp: Canvas app with multi-level approval workflows, 7-step form wizard, custom PCF components (TypeScript/React/Fluent UI), Power Automate integration
SharePoint Architect
Vattenfall
SharePoint Site Provisioning App: SPFx frontend + Dataverse backend, 10k+ managed sites, row-level security at scale, Power Automate lifecycle automation, template-based provisioning with approval workflows
SharePoint Consultant
GASAG, DHL
Contact management solution (SharePoint, GASAG), backend/frontend optimization (C#, Entity Framework, SQL), IT Security Self Assessment (SharePoint, DHL), Site Provisioning (C#, Telekom)
Support Engineer
Vattenfall
SharePoint and Power Platform 3rd Level Support: 5+ model-driven apps, Dataverse backends
External SharePoint / Power Platform Specialist
GASAG, Vattenfall, DHL, Telekom
SharePoint Site Provisioning App: SPFx frontend + Dataverse backend, 10k+ managed sites, row-level security at scale, Power Automate lifecycle automation, template-based provisioning with approval workflows
Change Management Request PowerApp: Canvas app with multi-level approval workflows, 7-step form wizard, custom PCF components (TypeScript/React/Fluent UI), Power Automate integration
SharePoint and Power Platform 3rd Level Support: 5+ model-driven apps, Dataverse backends
Contact management solution (SharePoint, GASAG), backend/frontend optimization (C#, Entity Framework, SQL), IT Security Self Assessment (SharePoint, DHL), Site Provisioning (C#, Telekom)
SharePoint Consultant
Communardo, M-Events, AUC, GEOMAGIC
- Intranet solutions (Axel Springer AG, Voestalpine Group), Office 365 migrations, web applications (Vaadin)
Enterprise Developer
Vescore Solutions AG
Developed central Asset Management Infrastructure (C#, VBA, Excel, Bloomberg)
Application Developer, Junior Fund Manager, Team Lead
Vescore Solutions AG
Developed central Asset Management Infrastructure (C#, VBA, Excel, Bloomberg)
App Development (Java, C#), 3 years Junior Fund Manager (Value, Private Equity)
Vescore Solutions AG
- App Development (Java, C#), 3 years Junior Fund Manager (Value, Private Equity)
Software Developer
Dr. Grob & Partner AG
- Developed Bridge and Tunnel Management System (Visual Basic 6, ORACLE)
Industry experience
See where this freelancer has spent most of their professional time.
Experienced in Information Technology, Energy, Utilities, Transportation, Telecommunication, and Banking and Finance.
Business area experience
See which departments and functions this freelancer has contributed to most.
Experienced in Information Technology, Product Development, Operations, Investments and M&A, Strategy, and Business Intelligence.
Summary
AI Engineer with 25+ years in software development and 3+ years shipping enterprise GenAI solutions at scale. Designed and shipped a market intelligence RAG platform achieving 90% factuality (vs 53% for Microsoft Copilot) at 1/3 the cost. Built enterprise search crawler pipelines rolled out to 5,000+ users, ingesting SharePoint content across multiple sites and domains. Full-stack sole-developer delivery: Python backends (Azure Functions, FastAPI), TypeScript/React frontends (SPFx), Azure AI infrastructure. Security hardening (Managed Identities, RBAC), automated evaluation, and production deployment.
Available for freelance/contractor roles in AI Engineering, and Azure / SharePoint development starting August 2026.
Work Samples: [link]
Skills
- Enterprise Rag & Genai: Responses Api, Vector Stores, Metadata Extraction, Automated Evaluation
- Crawler & Data Pipelines: Sharepoint Crawling, Content Embedding, Overnight Sync, Multi-Source Ingestion
- Azure Ai Infrastructure: Azure Openai Service, Foundry Iq (Azure Ai Search), Azure Functions, Managed Identities, Rbac
- Frontend & Integration: Typescript, React, Fluent Ui, Spfx 1.23, Streaming Api, Multi-Tenant Deployment
- Azure App Service / Function Apps
- Python / Fastapi
- Typescript
- React / Fluent Ui
- Power Automate
- Sharepoint / Spfx
- C# / .Net / .Net Core
- Python 3.12
- Azure Openai Service, Responses Api, Vector Stores
- Foundry Iq / Azure Ai Search
- Rag: Chunking, Retrieval, Evaluation
- Managed Identities, Rbac, Msal.Js
- Sharepoint Rest Api, Pnp/Sp, Microsoft Graph
- Azure App Service, Key Vault, Microsoft Entra Id
- Power Apps, Dataverse, Power Automate
- C# / .Net, Sql, Entity Framework
- Html5, Css3, Scss Modules, Webpack
- Node.Js, Powershell, Azure Cli
- Azure Devops Pipelines, Git/Github
- Httpx, Beautifulsoup4, Playwright
- Microsoft Foundry: Automated Evaluation Pipelines, Llm-As-Judge Scoring, Factuality / Relevance / Coherence Metrics, Prompt Optimizations, Model Comparison
- Microsoft Copilot Ecosystem: Copilot Extensibility, Copilot Connectors, Sharepoint Premium, Custom Rag Alternatives
- Foundry Iq (Azure Ai Search): Custom Indexes, Hybrid Retrieval (Keyword + Vector), Metadata Enrichment, Sharepoint Connectors, Copilot Retrieval Api Integration
- Sharepoint Solutions: Information Architecture, Solution Design, Custom Collaboration Sites, Document Management Systems, Portals, Web Part Development, Integration With Azure Logic Apps Or Power Automate
Languages
Education
Bauhaus-University Weimar
Master of Civil Engineering (Dipl.-Ing.) · Civil Engineering · Weimar, Germany
Certifications & licenses
Exam 331: Core Technologies for Microsoft SharePoint Server 2013
Microsoft
Exam 480: Programming in HTML5 with Javascript and CSS3
Microsoft
Exam 486: Developing ASP.NET MVC Web Applications
Microsoft
Exam 488: Developing Microsoft SharePoint Server 2013 Core Solutions
Microsoft
Exam AI-102: Designing and Implementing a Microsoft Azure AI Solution
Microsoft
Exam AI-900: Azure AI Fundamentals
Microsoft
Statistics
Experience
Global experience
Expertise
Qualifications
Profile
Frequently asked questions
Have questions? Find more information here.
Karsten is based in Faro, Portugal.
Karsten speaks the following languages: German (Native), Hungarian (Native), English (Advanced).
Karsten has at least 23 years of experience. During this time, Karsten has worked in at least 11 different roles and for 6 different companies. The average length of individual experience is 2 years and 7 months. Note that Karsten may not have shared all experience and actually has more experience.
Based on recent experience, Karsten would be well-suited for roles such as: Azure AI Engineer, External Azure AI Engineer, Azure AI Engineer, SharePoint Developer.
Karsten's most recent position is Azure AI Engineer at Vattenfall.
In recent years, Karsten has worked for Vattenfall, GASAG, Vattenfall, DHL and Telekom.
Karsten is most experienced in industries like Information Technology, Energy, and Utilities. Karsten also has some experience in Transportation, Telecommunication, and Banking and Finance.
Karsten is most experienced in business areas like Information Technology, Product Development, and Operations. Karsten also has some experience in Investments and M&A, Strategy, and Business Intelligence.
Karsten has recently worked in industries like Energy, Utilities, and Transportation.
Karsten has recently worked in business areas like Information Technology, Product Development, and Operations.
Karsten holds a Master in Civil Engineering from Bauhaus-University Weimar.
Karsten has 6 certificates. Among them, these include: Exam 331: Core Technologies for Microsoft SharePoint Server 2013, Exam 480: Programming in HTML5 with Javascript and CSS3, and Exam 486: Developing ASP.NET MVC Web Applications.
Karsten is immediately available for suitable projects.
Daily rate distribution
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Average rates for similar positions
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The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 15 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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